/Engine/Plugins/Enterprise/DatasmithFBXImporter/Source/DatasmithFBXTranslator/Public/DatasmithFBXFileImporter.h
Tries to extract key frames from InCurve, building a newFDatasmithFBXSceneAnimCurveof type InType and component InComponent if it can. It does a lot of math to convert coordinate systems and correct the interpolation between keys
void FillCurveFromClipsFile ( FbxAnimCurve * InCurve, [EDatasmithFBXSceneAnimationCurveType](API\Plugins\DatasmithFBXTranslator\EDatasmithFBXSceneAnimationCurve-) InType, [EDatasmithFBXSceneAnimationCurveComponent](API\Plugins\DatasmithFBXTranslator\EDatasmithFBXSceneAnimationCurve-_1) InComponent )